User Registration File Upload 1.3.13

* Enhance - Suppors more file type like csv,ppt,xls,xlsx.
* Fix - File size validation message.
* Fix - Proper validation for deleting self uploaded file.
* Fix - Valid file not being uploaded in edit-profile page.
* Fix - Check the file exists or not before delete the file.
* Fix - Valid File Types option individual form setting not working.
* Fix - Prevent edit profile update with prevailing file upload error.
* Fix - Default file type validation when no file type validation set.

* Enhance - Dropzone buttons in edit profile page.
* Enhance - File listing design in user edit in wp-admin.
* Fix - Use ini max file size if not set.
* Fix - Max file size setting accepting negative values.
* Fix - Serverside validation for valid file type.

* Feature - Add tooltip for file upload field label in frontend.
* Enhance - Display icons for uploaded files according to extension.
* Tweak - Replace incremental file name function with WordPress default.
* Fix - File upload not working from admin side edit user.
* Fix - Remove uploaded files if the user does not register.
* Fix - Removed file from media occupies the space in users file upload field.